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A&P - Chap 6

compact bone dense and looks homogenous
spongy (cancellous) bone composed of flat or needle like pieces
trabeculae needle like or flat pieces of bone in spongy bone
sesamoid bones, example type of short bone embedded in tendon, patella
shape classifications (4) long, short, irregular, flat
diaphysis shaft
medullary cavity contains yellow bone marrow
epiphyses the bone ends
epiphyseal line line of cartilage where epiphyses meet the diaphyses
periosteum shaft is protected by this white, double layered membrane
osteoblasts bone forming cells
osteoclasts bone destroying cells
Sharpey's fibers connects what? periosteum to shaft
endosteum lines the inside of the bone
articular cartilage covers epiphyses, hyaline
osteon, Haversian system the circle of bone under microscope
lamella the rings inside the circles of bone under a microscope
the central, haversian canal blood vessels and nerve fibers pass through hole under microscope
perforating, volkmann's canals run at right angles to axis of the bone, connecting nerves of periosteum to central canals
osteocytes dots under microscope, in lacunae
canaliculi hairlike canals connect lacunae to each other and the central canal
hydroxyapatites mineral salts
osteogenesis or ossification the process of bone formation
intramembranous ossification bone forms from fibrous membrane (embryo) FORMS FLAT BONES
endochondral ossification bone forms from hyaline cartilage
3 steps of intramembranous ossification formation of bone matrix, formation of woven bone and periosteum, formation of compact bone plates
steps of endochondral ossification formation of bone collar, cavity forms,vessel enters (periosteal bud), epiphyses form, complete
appositional growth bone grows in thickness on the outside
parathyroid hormone released when blood calcium declines, and causes bones to lose calcium
calcitonin released when blood calcium rises, causes bones to get calcium
wolff's law bones remodel in response to outside forces
osteoperosis bone resorption outpaces bone deposit
osteomalacia bones are inadequately mineralized (Rickets in children)
Paget's disease bone resorption or formation is abnormal, ex: high ratio of woven bone to compact
Created by: ngrable



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